Asap plz

which of the following explains the conservation of mass during cellular respiration?

a. the total number of atoms when carbon dioxide and oxygen react stays the same when glucose and water are produced.

b. the total number of atoms when water and oxygen react stays the same when glucose and water are produced.

c. the total number of atoms when carbon dioxide and water react stays the same when glucose and oxygen are produced.

d. total number of atoms when glucose and oxygen react stays the same when carbon dioxide and water are produced.

How does the digestive system interact with the circulatory system? a. messages sent as electrical impulses from the digestive system are transported throughout the body by the circulatory system. b. nutrients taken in and broken down by the digestive system are carried to various parts of the body by the circulatory system. c. nutrients and gases are absorbed by organs in the circulatory system. then, they are transported to all parts of the body by organs in the digestive system. d. oxygen and carbon dioxide are exchanged by organs in the digestive system, and the gases are carried to the rest of the body by the circulatory system.